21130641

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{139}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 37273600

約数和(自身を除く): 16142959

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 127, 133, 139, 171, 381, 399, 417, 889, 973, 1143, 1197, 1251, 2413, 2641, 2667, 2919, 7239, 7923, 8001, 8757, 16891, 17653, 18487, 21717, 23769, 50673, 52959, 55461, 123571, 152019, 158877, 166383, 335407, 370713, 1006221, 1112139, 2347849, 3018663, 7043547, 21130641]

約数ペア:

[(1, 21130641), (3, 7043547), (7, 3018663), (9, 2347849), (19, 1112139), (21, 1006221), (57, 370713), (63, 335407), (127, 166383), (133, 158877), (139, 152019), (171, 123571), (381, 55461), (399, 52959), (417, 50673), (889, 23769), (973, 21717), (1143, 18487), (1197, 17653), (1251, 16891), (2413, 8757), (2641, 8001), (2667, 7923), (2919, 7239)]